That's a good point. Though for a person that bought the game after the achievements were added, was a great add-on. Love the achievements for this game! There easy-ish to get, and not really something you have to grind to long on to get.

I would agree if not for the point that "Die 1000 times" im sure had you grinding well before the new achievements

Yeah, for a good part of that achievement I had a script doing the work. I don't think this really changes my point.

I was playing the game after 100% because I still had fun playing it. When I got bored, I moved on. Now to keep my game 100% I'd have to get the new achievements, but I already played enough so the game I don't find the game that fun anymore.

I feel like this is more a problem of adding content to a game you don't enjoy anymore, than it is adding achievements. If they simply added achievements without adding content, then yeah, there's very little to get you back into the game. But this is essentially free DLC and the achievements that come with it.